Dyestuffs of the anthraquinone series



j quinone sulfonic acid Patented Oct. 16, 1928.

UNITED STATES .xmus WEINAND, or COLOGNE-FLITTARD, GERMANY, ASSIGNOR 'ro GRASSELLI DYE- STUFF CORPORATION, OF NEW YORK,

N. Y.. A CORPORATION OZEDELAWARE.

v DYESTUFFS OF THE ANTHRAQUINONE SERIES.

stuffs of the anthraquinone series and consists in introducing amino groups of cyclic paraffins lnto the anthraquinone nucleus. The term cyclic paraflins' as used hereln ismeant to cover the products obtained by hydrogenating cyclic compounds other than those of the benzene and naphthalene series, e. g.

compounds having five, seven orten carbon atoms in'a ring configuration,

The manufacture of the new dyestuffs is i I efiected by causing an amine of a cyclic paraliin, e. g. pentamethyleneamine, bornyl-- amine to react upon a halogenated anthracatalyst. I

- The new dyestufis' are generally blue crystalline substances, easily soluble in water and dyeing animal fibres exceedingly pure, blue shades, fast to light.

The following examples will illustrate my invention: 7

Example 1.20 parts by Weight of 1- amino--bromanthra uinone-2-sulfonic acid, 12 parts by weight 0 sodium carbonate and 60 parts by weight of pentamethyleneamine i 12 parts by weight of'sodium carbonate and k v arts by Weight of bornylamine are disa! formulaaredissolved in 900 parts by weight of water and 100 parts by Weight of alcohol with the addition of -1 part by weight of copper sulfate. The whole is boiled under reflux for a period of two hours, whereby the solution assumes a blue' coloration. Then the alcohol and the excess of the base are distilled off and the dyestutf is precipitated by means of common salt in the form of a crystalline mass. Inits free state it has most probably the CHr-C It dissolves in water With'a clear blue coloration and, dyes wool from an acid bath in very clear, blue shades, which are fast to light.

Ewom tple 2.-20 parts by weight of 1- aminoi-bromanthraquinone-2-sulfonic acid,

solved in 900 parts by weight of water and in presence of a copper' light.

- No Drawing. Application filed December 23, 192 7, Serial-No. 242 282, and in Germany December 20, 1926.

100 parts by weight of alcohol with the addit1on of 1 part by weight of copper sulfate. The whole 1s boiled under reflux for a period of two hours, whereby the solution assumes a blue coloration. Then the alcohol and the excess of the base are distilled off and the dyestufi' 1s precipitated by means of commonsalt in the form of a crystalline mass. In 1ts free state it has most probably the formula: t

tion and dyes wool from an acid bath in very clear, blue shades, which are fast to light.

I claim: i

1. As new products amino-anthraquinone compounds in which one hydrogen atom of the .amino group is substituted by a cyclic par'aflin radicle other than those obtained by hydrogenating compounds of the benzene and naphthalene series.

2.. As new products amino-anthraqui'none sulfonic acids in which one hydrogen atom of the amino group is substituted by a cyclic paraflin radicle other than thoseobtained by .hydrogen-ating compounds .of the benzene and naphthalene series being water soluble, blue crystalline substances,d eing animal fibres exceedingly clear, blue shades, fast to 3. As new products 1.4-diam inoanthraquiv none-2 sulfonic acids which are substituted in the 4-amino-group by a cyclic paraflin radicle other thanthose obtained by hydrogenating compounds of the benzene and naphthalene series, which-are water soluble blue crystalline substances, dyeing animal fibres exceedingly clear, blue shades, fast to 1i ht.- v

4. As a new product 1-amino-4-penta- 'methyleneamine-anthraquinone 2- sulfonic acid, u hich crystallizes in blue needles, being Q to light and having in a free state most prob-v ably the formula J NH:

(I SOIH o0 1o i y ens-0H1 NH-CH CHa-OH:

5. The process which comprises reacting.

in the presence of a copper catalyst with a cyclic parafiin amine-other than those obtained by hydrogenating compounds of the 1 6. The process which comprises reacting inthe presence of a copper catalyst with a cyclic paraflin amine other than those obtained by hydrogenating compounds of the benzene and naphthalene series upon asulfonic acid of a halogen anthraquinone compound.

7. The process whlch comprises reacting in presence of a copper catalyst with an amine of a cyclic paraflin other than those obtained by hydrogenating compounds of the benzene and naphthalene series upon 1-amino-4- bromo-2-anthraquinone sulfonic acid.

8. The'process which comprises heating an aqueous solution of 1-amino-4-bromo-anthraquinone-Q-sulfonic acid with pentamethyleneamine and copper sulfate.

In testimony whereof I have hereunto set my hand. a

KLAUS WEINAND. 

